Green Cube, Yellow Cube
For the 2 x 2 cube
Idil (Private IRMAK Primary & Secondary School, Istanbul,
Turkey) says, "All of them must be the same. Three faces with one
corner in common will be yellow, the other three faces with the
diagonal corner will be green".

Jason (Priory School UK), Christina (Malborough Primary School,
UK), and Dogan (Private IRMAK Primary & Secondary School,
Istanbul, Turkey) drew a net of a cube to show the colour of each
face.

For the 3 x 3 cube
Dogan (Private IRMAK Primary & Secondary School, Istanbul,
Turkey) explains that "We can paint corners the same as we did
before. Then we can paint cubes in the middle like 2 sides yellow,
2 sides green - you don't need to paint the other sides. The
following figure shows an opened middle cube and how it should be
painted".
